dmaengine: idxd: add halt interrupt support

dmaengine: idxd: add halt interrupt support

[ Upstream commit 88d97ea82cbe352851a8654ee952d3a694c8c2c6 ]

Add halt interrupt support. Given that the misc interrupt handler already
check halt state, the driver just need to run the halt handling code when
receiving the halt interrupt.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163114224352.846654.14334468363464318828.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>